Well here is my Super Death Tank, I only worked on it for two days so I still plan on adding a few "features" on it.
Too lazy to take pictures so I made a video.
Video:http://www.flickr.com/photos/44640380@N07/6273866121/Features include: Escape hatch, Massive motorized minigun, Rail gun, back troop deployment door.
72 studs worth of Death.